SR-133 Roadway and TMS Improvements Project - Infiltration Testing Only
Summary
SCH Number
2025060135
Public Agency
California Department of Transportation, District 12
(DOT)
Document Title
SR-133 Roadway and TMS Improvements Project - Infiltration Testing Only
Document Type
NOE - Notice of Exemption
Received
Posted
6/4/2025
Document Description
District 12 NPDES Stormwater Branch has requested Office of Geotechnical Design
South, Branch C, to perform infiltration testing and gather information needed for design of proposed treatment BMP features along State Route 133.
All work will take place within the existing Caltrans right of way (ROW). Acquisition of
new ROW is not anticipated or proposed for this project. Traffic control during drilling
and infiltration testing will be handled in accordance with Standard Plans.
A minimum of one 8” diameter borehole will be drilled in each of the proposed treatment BMP areas (shown in green on the attached Layout Plans) to a maximum depth of 25’ below ground surface. Soil samples will be collected at various depths during the drilling operation and will be sent out for lab testing. Infiltration testing will be performed following drilling of the borehole. The infiltration test procedure will consist of placing 2 inches of gravel at the bottom of the hole and filling the hole at least 5 times the hole’s radius with water. The change in water level will be recorded at various times until all the water has percolated through the borehole. The borehole will be backfilled with neat cement grout according to Orange County Health Care Agency borehole backfill requirements for soil borings. The equipment utilized in this operation will consist of a drill rig, water tender/truck for water supply, and a pickup truck with trailer or flatbed truck for drum storage transportation. Refer to the Site Layouts for the work and equipment parking areas. All soil cuttings and excess grout mix will be contained in 55-gallon drums and will be disposed of offsite in accordance with the Orange County Health Care Agency regulations. No materials will be spread or remain on-site. To ensure grout spills are contained, BMPs will be implemented during the operation. Groundwater is not anticipated to be encountered.
Contact Information
Name
Carmen Lo
Agency Name
Caltrans District 12
Job Title
Associate Environmental Planner
Contact Types
Lead/Public Agency / Project Applicant
Phone
Email
Location
Cities
san juan, San Juan Capistrano
Counties
Orange
Regions
Southern California
Cross Streets
SR-133
Total Acres
NA
Parcel #
NA
State Highways
SR-133
Railways
NA
Airports
NA
Schools
NA
Waterways
NA
Township
NA
Range
NA
Section
NA
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Cal. Code Regs. tit. 14 § 15301 - Existing Facilities
Reasons for Exemption
Class 1 consists of the operation, repair, maintenance, permitting, leasing, licensing, or minor alteration of existing public or private structures, facilities, mechanical equipment, or topographical features, involving negligible or no expansion of existing or former use. The types of "existing facilities" itemized below are not intended to be all-inclusive of the types of projects which might fall within Class 1. The key consideration is whether the project involves negligible or no expansion of use.
(c) Existing highways and streets, sidewalks, gutters, bicycle and pedestrian trails, and similar facilities (this includes road grading for the purpose of public safety, and other alterations such as the addition of bicycle facilities, including but not limited to bicycle parking, bicycle-share facilities and bicycle lanes, transit improvements such as bus lanes, pedestrian crossings, street trees, and other similar alterations that do not create additional automobile lanes).
County Clerk
Orange
Attachments
Notice of Exemption
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